The main difference is that the subjects are categorized differently, the physical characteristics are different, and the habits are different, as follows:

One, the subjects are categorized differently

1, mackerel

The mackerel, the scientific name of mackerel, is also known as oil carcass fish, mackerel, flower pool fish, flower bar, flower anchovy, and so on. Perch order, mackerel family, mackerel genus.

2, Spanish mackerel

Spanish mackerel, also known as swallowfish, plate Spanish mackerel, bamboo mackerel, pointed mackerel, green arrow and so on. Perch order, Spanish mackerel family, horse mackerel genus.

Two, different physical characteristics

1, mackerel

The fish is taller, oval-shaped, two dorsal fins farther apart, the caudal fin above and below each of the five small blubber fins, the back is greenish-black, with irregular dark blue mottling, and the abdomen is yellowish.

2, Spanish mackerel

Spanish mackerel is longer, rounded, two dorsal fins close together, 8-9 small blubber fins above and below the caudal fins, dorsal side is black-blue with many black round spots, ventral side is silver-gray, and the abdomen is off-white.

Three: Different habits

1. The mackerel

The mackerel is a pelagic, warm-water fish that doesn't enter freshwater and swims long distances every year, with a strong swimming ability and large speed. It inhabits the upper and middle layers in spring and summer, and is active above the thermocline, often forming large groups in the reproductive season. During the reproductive season, they often form large groups at the surface. They have phototropic reproductive habits. The mackerel spawns in batches and releases eggs at least three times during the reproductive season. Eggs are released mainly around midnight and dawn, or from evening to dawn. Or from evening to midnight. The amount of eggs carried ranges from about 25 to 2.63 million.

2, Spanish mackerel

is a warm pelagic fish to feed on small pelagic fish, summer and fall group migration, part of the Bohai Sea into the spawning, the autumn floods are often groups of bait in the coastal islands and rocky reefs near the Spanish mackerel sex ferocious, from June to October each year, often cruising in the shallow water along the shore to chase food, its streamlined shape, high swimming speed, sharp teeth, like a cheetah chasing its prey, the panic of the small fish around! Scurrying, often panicked and rushed to the shore on the reef "rows", the spectacular scene of Spanish mackerel flying to catch food.

Baidu Encyclopedia - Mackerel

Baidu Encyclopedia - Spanish Mackerel

Baidu Encyclopedia - Pacific Mackerel